BMW’s R32 motorcycle was a star at the 1923 Paris Salon. Max Friz’s Bayern Kleinmotor became a classic, yet another exhibit just as advanced is almost forgotten. Vauxhall had one also with shaft drive and an in-line 4-cylinder engine, against BMW’s side-valve flat-twin. Friz had already a horizontal 2-cylinder but for 1923 placed it sideways, its cooling fins out in the airstream, creating a motorcycling hallmark.